3 speed wiper motor

[Dartfreak75]

I tested my wiper motor using the bench method and a battery. The ground was good nothing happened. So my question should you be able to turn the pivot on the motor by hand? Its doenst move at all does that mean the motor is locked up? Or is it designed not to move? Thanks

 

[moparmandan]

I wouldn't force it. There is a plastic gear and other plastic Park switch mechanisms in there. There are pictures in the FSM. Have a look.

 

[Dartfreak75]

I wouldn't force it. There is a plastic gear and other plastic Park switch mechanisms in there. There are pictures in the FSM. Have a look.

I tried to take it apart and pull the motor out to see if I could turn the motor by hand with all the mechanism off the shaft but one of the screws is stuck. I soaked it in kroil and will try again tomorrow. I'm about will to bet its locked up too. I looked in the fsa I couldn't find it I will look again.

 

[Dartfreak75]

Found it it's in the chassis fsa i was looking in the body fsa

 

[moparmandan]

Wiper motors maybe in the chassis service manual.

 

[moparmandan]

LOL

 

[moparmandan]

Anywho, in the past I have found most nos replacement parts on flea bag.

 

[Tanker]

I believe that’s a worm gear in there. If so you won’t be able to turn it from the wiper end.

 

[moparmat2000]

Worm and pinion setup. You cannot turn by hand. And you cannot test the motor seperate of the aluminum housing on these. The worm gear is part of the motor armature. It is supported by the motor end bell on the brush end, and supported by the aluminum housing on the other end.

Theres also a small steel ball and spring at the end of the worm gear with a set screw. These parts are located inside the aluminum gear housing, and are there to prevent the worm gear from pulling the motor armature forward in the motor housing and causing it to bind up. These are very small parts dont lose them. I believe later versions only have the adjustment/set screw with a nylon tip on them, but dont quote me on that.

If your going to take this thing apart, best bet is inside the house in a clean area where the pieces wont be disturbed or get lost. Get a nice cardboard box for it all and ziplock bags for the small parts, and take a lot of pix. Theres also really thin shim washers for the pinion, and motor. Dont lose any of this stuff. Snap pix of all the wiring before you unsolder it. Theres 2 contacts on the top of the gear case assembly soldered into a plastic piece. This is for the park feature.

If you look online theres a way to bench test this thing. It's not just add power and ground. Theres also multiple jumper wires that have to be set up into correct config to see low, med, and high, as well as park. The multiple jumper wires are in effect taking place of the dash switch.

When I restored the prestolite Vspeed for my 67 the only thing I was able to test in this way was low, high, and park. Variable speed could not be tested because the jumper wires are not a variable resistor.

When I reassembled the motor and installed it in the gear housing I installed the ball, spring, and set screw, as well as the plastic pinion gear, and ran the motor off 12V while adjusting the set screw. If you set it too tight the motor will bind, set it too loose the motor armature will pull forward. See pix below of the V speed I restored, and you will see why i mentioned indoors, on a clean table, and the cardboard box and ziplock bags for parts so they dont get lost. This is not something you want to take apart on a truck tailgate or a picnic table

Hope this helps
Matt

 

[Tanker]

Worm and pinion setup. You cannot turn by hand. And you cannot test the motor seperate of the aluminum housing on these. The worm gear is part of the motor armature. It is supported by the motor end bell on the brush end, and supported by the aluminum housing on the other end.

Theres also a small steel ball and spring at the end of the worm gear with a set screw. These parts are located inside the aluminum gear housing, and are there to prevent the worm gear from pulling the motor armature forward in the motor housing and causing it to bind up. These are very small parts dont lose them. I believe later versions only have the adjustment/set screw with a nylon tip on them, but dont quote me on that.

If your going to take this thing apart, best bet is inside the house in a clean area where the pieces wont be disturbed or get lost. Get a nice cardboard box for it all and ziplock bags for the small parts, and take a lot of pix. Theres also really thin shim washers for the pinion, and motor. Dont lose any of this stuff. Snap pix of all the wiring before you unsolder it. Theres 2 contacts on the top of the gear case assembly soldered into a plastic piece. This is for the park feature.

If you look online theres a way to bench test this thing. It's not just add power and ground. Theres also multiple jumper wires that have to be set up into correct config to see low, med, and high, as well as park. The multiple jumper wires are in effect taking place of the dash switch.

When I restored the prestolite Vspeed for my 67 the only thing I was able to test in this way was low, high, and park. Variable speed could not be tested because the jumper wires are not a variable resistor.

When I reassembled the motor and installed it in the gear housing I installed the ball, spring, and set screw, as well as the plastic pinion gear, and ran the motor off 12V while adjusting the set screw. If you set it too tight the motor will bind, set it too loose the motor armature will pull forward. See pix below of the V speed I restored, and you will see why i mentioned indoors, on a clean table, and the cardboard box and ziplock bags for parts so they dont get lost. This is not something you want to take apart on a truck tailgate or a picnic table

Hope this helps
Matt

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Excellent write up. Thanks for posting this.

 

[Dartfreak75]

Worm and pinion setup. You cannot turn by hand. And you cannot test the motor seperate of the aluminum housing on these. The worm gear is part of the motor armature. It is supported by the motor end bell on the brush end, and supported by the aluminum housing on the other end.

Theres also a small steel ball and spring at the end of the worm gear with a set screw. These parts are located inside the aluminum gear housing, and are there to prevent the worm gear from pulling the motor armature forward in the motor housing and causing it to bind up. These are very small parts dont lose them. I believe later versions only have the adjustment/set screw with a nylon tip on them, but dont quote me on that.

If your going to take this thing apart, best bet is inside the house in a clean area where the pieces wont be disturbed or get lost. Get a nice cardboard box for it all and ziplock bags for the small parts, and take a lot of pix. Theres also really thin shim washers for the pinion, and motor. Dont lose any of this stuff. Snap pix of all the wiring before you unsolder it. Theres 2 contacts on the top of the gear case assembly soldered into a plastic piece. This is for the park feature.

If you look online theres a way to bench test this thing. It's not just add power and ground. Theres also multiple jumper wires that have to be set up into correct config to see low, med, and high, as well as park. The multiple jumper wires are in effect taking place of the dash switch.

When I restored the prestolite Vspeed for my 67 the only thing I was able to test in this way was low, high, and park. Variable speed could not be tested because the jumper wires are not a variable resistor.

When I reassembled the motor and installed it in the gear housing I installed the ball, spring, and set screw, as well as the plastic pinion gear, and ran the motor off 12V while adjusting the set screw. If you set it too tight the motor will bind, set it too loose the motor armature will pull forward. See pix below of the V speed I restored, and you will see why i mentioned indoors, on a clean table, and the cardboard box and ziplock bags for parts so they dont get lost. This is not something you want to take apart on a truck tailgate or a picnic table

Hope this helps
Matt

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Thank you matt. I appreciate it. After seeing all that I may not tear into this one quite yet lol